The app purports to be nothing more than a random number generation tool. But entering "1984" in the minimum field and "31337" in the maximum field--numbers of significance in the hacker community--and tapping the "generate" button reveals a tethering network configuration screen.

Nick Kramer, CEO of Shmoopi, LLC, acknowledged in an email that his app supports tethering. "Reluctantly, I will admit that my application 'iRandomizer Numbers' does have a hidden tethering feature," he wrote. "I say reluctantly because I didn't plan on the feature being released. I designed the tethering functionality for my family and close friends not thinking it would be disseminated outside that circle. ""